20605047424 has 32 divisors (see below), whose sum is σ = 44206745940. Its totient is φ = 9510021120.

The previous prime is 20605047413. The next prime is 20605047461. The reversal of 20605047424 is 42474050602.

It can be written as a sum of positive squares in 2 ways, for example, as 20458153024 + 146894400 = 143032^2 + 12120^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 20605047424.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6189757 + ... + 6193084.

Almost surely, 2^20605047424 is an apocalyptic number.

It is an amenable number.

20605047424 is an abundant number, since it is smaller than the sum of its proper divisors (23601698516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20605047424 is a wasteful number, since it uses less digits than its factorization.

20605047424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12382868 (or 12382856 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 34.

The spelling of 20605047424 in words is "twenty billion, six hundred five million, forty-seven thousand, four hundred twenty-four".